212 lines
7.2 KiB
Python
212 lines
7.2 KiB
Python
# Copyright (c) 2014 Mirantis Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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# implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import abc
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import os
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import shutil
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import sys
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import tempfile
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import uuid
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from muranoclient.common import exceptions as muranoclient_exc
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import six
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from murano.common import config
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from murano.common.i18n import _LE
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from murano.dsl import exceptions
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from murano.engine import yaql_yaml_loader
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from murano.openstack.common import log as logging
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from murano.packages import exceptions as pkg_exc
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from murano.packages import load_utils
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LOG = logging.getLogger(__name__)
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class PackageLoader(six.with_metaclass(abc.ABCMeta)):
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@abc.abstractmethod
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def get_package(self, name):
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pass
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@abc.abstractmethod
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def get_package_by_class(self, name):
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pass
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class ApiPackageLoader(PackageLoader):
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def __init__(self, murano_client_factory, tenant_id):
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self._cache_directory = self._get_cache_directory()
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self._murano_client_factory = murano_client_factory
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self.tenant_id = tenant_id
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def get_package_by_class(self, name):
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filter_opts = {'class_name': name}
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try:
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package_definition = self._get_definition(filter_opts)
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except LookupError:
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exc_info = sys.exc_info()
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raise exceptions.NoPackageForClassFound(name), None, exc_info[2]
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return self._get_package_by_definition(package_definition)
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def get_package(self, name):
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filter_opts = {'fqn': name}
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try:
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package_definition = self._get_definition(filter_opts)
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except LookupError:
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exc_info = sys.exc_info()
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raise exceptions.NoPackageFound(name), None, exc_info[2]
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return self._get_package_by_definition(package_definition)
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@staticmethod
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def _get_cache_directory():
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base_directory = (
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config.CONF.packages_opts.packages_cache or
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os.path.join(tempfile.gettempdir(), 'murano-packages-cache')
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)
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directory = os.path.abspath(os.path.join(base_directory,
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str(uuid.uuid4())))
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os.makedirs(directory)
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LOG.debug('Cache for package loader is located at: %s' % directory)
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return directory
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def _get_definition(self, filter_opts):
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filter_opts['catalog'] = True
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try:
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packages = list(self._murano_client_factory().packages.filter(
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**filter_opts))
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if len(packages) > 1:
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LOG.debug('Ambiguous package resolution: '
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'more then 1 package found for query "{0}", '
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'will resolve based on the ownership'.
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format(filter_opts))
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return get_best_package_match(packages, self.tenant_id)
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elif len(packages) == 1:
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return packages[0]
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else:
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LOG.debug('There are no packages matching filter '
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'{0}'.format(filter_opts))
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raise LookupError()
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except muranoclient_exc.HTTPException:
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LOG.debug('Failed to get package definition from repository')
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raise LookupError()
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def _get_package_by_definition(self, package_def):
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package_id = package_def.id
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package_name = package_def.fully_qualified_name
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package_directory = os.path.join(self._cache_directory, package_name)
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if os.path.exists(package_directory):
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try:
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return load_utils.load_from_dir(
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package_directory, preload=True,
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loader=yaql_yaml_loader.YaqlYamlLoader)
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except pkg_exc.PackageLoadError:
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LOG.exception(_LE(
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'Unable to load package from cache. Clean-up...'))
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shutil.rmtree(package_directory, ignore_errors=True)
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try:
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package_data = self._murano_client_factory().packages.download(
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package_id)
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except muranoclient_exc.HTTPException as e:
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msg = 'Error loading package id {0}: {1}'.format(
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package_id, str(e)
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)
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exc_info = sys.exc_info()
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raise pkg_exc.PackageLoadError(msg), None, exc_info[2]
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package_file = None
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try:
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with tempfile.NamedTemporaryFile(delete=False) as package_file:
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package_file.write(package_data)
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return load_utils.load_from_file(
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package_file.name,
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target_dir=package_directory,
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drop_dir=False,
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loader=yaql_yaml_loader.YaqlYamlLoader
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)
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except IOError:
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msg = 'Unable to extract package data for %s' % package_id
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exc_info = sys.exc_info()
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raise pkg_exc.PackageLoadError(msg), None, exc_info[2]
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finally:
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try:
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if package_file:
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os.remove(package_file.name)
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except OSError:
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pass
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def cleanup(self):
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shutil.rmtree(self._cache_directory, ignore_errors=True)
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def __enter__(self):
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return self
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def __exit__(self, exc_type, exc_val, exc_tb):
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self.cleanup()
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return False
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class DirectoryPackageLoader(PackageLoader):
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def __init__(self, base_path):
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self._base_path = base_path
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self._processed_entries = set()
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self._packages_by_class = {}
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self._packages_by_name = {}
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self._build_index()
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def get_package(self, name):
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return self._packages_by_name.get(name)
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def get_package_by_class(self, name):
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return self._packages_by_class.get(name)
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def _build_index(self):
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for entry in os.listdir(self._base_path):
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folder = os.path.join(self._base_path, entry)
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if not os.path.isdir(folder) or entry in self._processed_entries:
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continue
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try:
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package = load_utils.load_from_dir(
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folder, preload=True,
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loader=yaql_yaml_loader.YaqlYamlLoader)
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except pkg_exc.PackageLoadError:
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LOG.exception(_LE('Unable to load package from path: '
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'{0}').format(entry))
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continue
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for c in package.classes:
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self._packages_by_class[c] = package
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self._packages_by_name[package.full_name] = package
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self._processed_entries.add(entry)
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def get_best_package_match(packages, tenant_id):
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public = None
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other = []
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for package in packages:
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if package.owner_id == tenant_id:
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return package
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elif package.is_public:
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public = package
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else:
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other.append(package)
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if public is not None:
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return public
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elif other:
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return other[0]
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